Combined drilling and bolt-cutting machine.



- PATEN'IIED MAR. 6, 1906.

K. G. DAVIS. COMBINED DRILLING AND BOLT CUTTING MACHINE.

APPLICATION FILED MAY 17. 1905.

2 SHBETS-SHEET 1.

WITNESSES:

IIVVEIVTOI? |5;(4M*JJ KENNETH ATTORNEYS No. 814,589. PATENTED MAR. 6,1906.-

K. G. DAVIS. 'OOMBINBD DRILLING AND BOLT CUTTING MACHINE.

APPLICATION FILED MAY17. 1905.

2 SHEETS-SHEET 2.

WITNESSES:

g. v KENNETH C. DAVIS Q.

ATTORNEYS I/VVENTOI? KENNETH CASSIOUS DAVIS, OF ELY, NEVADA.

COMBINED DRILLING AND BOLT-CUTTING MACHINE.

Specification of Letters Patent.

Patented March 6, 1906.

Application filed May 17,1905. Serial No. 260.821.

To all whom it-may concern.-

Be it known that I. KENNETH CAssIoUs DAVIS, a citizen of the UnitedStates, residing at Ely, in the county of White Pine and State ofNevada, have invented an Improved Combined Drilling and Bolt-CuttingMachine, of which the following is a specification.

My invention relates to novel attachments for and changes ofconstruction in vertical drillingmachines, and includes improved meansfor threading bolts or rods of any desired length.

The details of construction, arrangement, and combination of parts areas hereinafter described, and illustrated in the accompanying drawings,in which Figure 1 is a side elevation of a vertical drilling-machineprovided with my improved attachments and changes of constructionwhereby it is adapted for various kinds of work in a new and improvedmanner. Fig. 2 is a perspective View. Fig. 3 is a plan view ofanimproved holder for a threaded cuttingdie. Fig. 4 is a horizontalsection taken above the faceplate or table. Fig. 5 is mainly a verticalsection of a portion of the machine illustrated in Fig. 1, the sameshowing my bolt-cutting attachment. Fig. 6 is a horizontal section onthe line 6 6 of Fig. 5. Fig. 7 is a central vertical longitudinalsection of the face-plate or table and the means for adjusting the twoparts thereof. Fig. 8 is a vertical section on the line 8 8 of Fig. 7.Fig. 9 is a perspective view of a supplemental jaw or gripping-plateused with the face-plate or table. Fig. 10 is a perspective view of atool holder or socket for use in connection with the arbor or spindle ofa drilling-machine.

Referring in the first instance to Fig. 1, a indicates a pillar frame orstandard fixed to a horizontal base I) and having an upper portion 0,which is branched and otherwise constructed as usual in verticaldrilling-machines. The machine is also provided with hand andself-acting feed and cone speedpulleys in the usual manner.

To the sleeve (1 of the drilling-spindle e and to the lower portion ofthe spindle itself I apply sleeves 1 and 2, (see Fig. 5), which areprovided with lateral arms 3 4, that support a tubular die-carrier 5.The same is fluted or grooved throughout its length and is open at eachend, the lower end being adapted for attachment of a threaded cutter 6.For the purpose of operation the die-carrier 5 is slid able verticallyin flanged sleeves 7, which are held rotatably in the arms 3 4 of theaforesaid sleeves 1 2. A spur-gear 8 is keyed upon the shaft 6 of thedrilling-spindle and engages the grooved or toothed die-carrier 5, sothat the latter is rotated with the drillspindle, but obviously at amuch inore rapid rate.

The die-carrier 5 is slidable vertically in the rotatable sleeves 7, butthe gear 8 always remains engaged or in mesh therewith. The die-carrieris adapted to operate upon bolts or rods of any desired length, sincethe same may extend upward from the face plate through the die-carrier,which may be placed in any required position around the drill arbor orspindle. Such bolt or rod may be extended downward to any desired lengthand even pass through an opening in the base or platform 6. of themachine. The feed of the die-carrier 5 is regulated by the thread in thedie being used.

The face-plate or table 9 is constructed in halves or. two like partsinstead of being made solid, as usual heretofore, and each part 9 isprovided with a central pendent lug 10, (see Fig. 7,) in which work aright and left feed-screw 11, the same having a hand operating wheel 12.It is obvious that by rotating said screw the two parts or jaws 9 of theface-plate will be caused to recede from or approach each othercorrespondingly. As shown in Fig. 8, each aw is further provided withtwo pendent lugs 12, which have horizontal dovetailed grooves in theirinner sides to receive corresponding guide-ribs 13, forming part of thebracket 14, which constitutes a usual attachment of drilling-machines ofthis class. As shown in Fig. 1, the said bracket is adapted for verticaladjustment on the pillar frame or standard a by the usual means and isalso counterbalanced in a wellknown manner. It may also swinghorizontally on the standard. The face-plate thus constructed is adaptedto serve as a vise or gripper or holder for bolts, rods, or other blankswhich are to be operated upon either by the die cutter or drill or anyother tool that may be held in the rotatable parts above the same. Theplate being adjustable toward and from the pillar-frame a, the work maybe carried right or left, so as to quickly center it under thedie-carrier 5 or the drill arbor or spindle, as conditions require. Apivoted cam 14 (see Fig. 1) or any other equivalent device may beemployed for looking the face-plate in any adjustment on the IIO braclat1 1. I propose to employ a supplemental jaw of'gripping-plate 15, (seeFig. 5,) which is constrn -cted in right-angular form and provided onits vertical side with a series of parallel grooves 16, whose sides forman acute angle and are grooved vertically. The

grooves and teeth thereof adapt this device for holding bolts, rods, andother blanks with great security.

As shown in Fig. 2, the parts 9 9 of the face plate may be each providedwith two holes 17 for reception of dowels of supplemental jaws orwork-holding devices that may be applied on the face-plate for thepurpose of gripping and holding large pieces of work which could not beinserted between the jaws themselves of the face-plate. In other words,metal blocks having dowel-pins adapted to enter the sockets 17 (see Fig.4) may be arranged on the face-plate 9 parallel to each other, therebeing a considerable space between them when the jaws 9 9 are closetogether, as shown in Fig. 3. Consequently, when the jaws 9 9 areseparated the said blocks are separated to a corresponding width toreceive work between them.

In threading very long rods they may be extended down through an openingin the base I), and the face-plate will also be adjusted to grip thesame and hold them in exact alinement with the tool that is to operatethereon.

In Figs. 2 and 3 I show a form of holder for a die, the same comprisinga circular band provided with a clamp-screw and converging arms thatconnect it with a square shank 18. This shank is in practice adapted tofit into a corresponding socket in the lower end of the drill-spindle orin a detachable socket 19. (Shown in Fig. 10.) By thus constructing adie-holder with a square shank it is held in and adapted to rotate withthe socket without requiring to be held by friction, as heretofore.

In further reference to the face-plate I will state that its two parts 9and their adjusting screw-shaft 1 1 maybe moved together on the bracket14 toward and from the standard a, and hence work may be very quicklycentered after it has been clamped, by which a considerable advantage intime and labor is 1 obtained. Also by use of the supplemental detachablej aw-piece 15, Fig. 9, the work may be held firmly with less strain onthe screw-shaft 11, since the jaws 9 do not then require to be clampedso tightly. The outer end of the screw-shaft is made four-square toprovide for application of a wrench in case it is required.

What I claim is 1. The combination, with the rotatable arbor or spindleof a drilling-machine, of an attachment consisting of a tubulartool-carrier grooved or toothed throughout its length, and made slidablein its support means for supporting the same and holding it rotatably,and a gear on the arbor meshing with the said tool-carrier,substantially as described.

'2. The improved attachment for a vertical drilling-machine comprisingsleeves adapted for support upon the drill arbor or spindle of suchmachine and having lateral arms with alined openings therein,. rotatablesleeves held in said arms and provided with grooves interiorly, and atubular tool-holder which is grooved longitudinally corresponding to thesleeves and adapted for vertical adjustment therein, substantially asdescribed.

3. An improved attachment for a rotatable arbor or spindle consisting ofa tubular openend tool-carrier which is fluted or groovedlongitudinally, and a suitable holder for the tool-carrier which isadapted for attachment to the said arbor, said tool-carrier beingslidable in said holder, substantially as described.

4. The combination, with the rotatable arbor or spindle having a gearfixed thereon, of sleeves provided with laterally-projecting arms,rotatable sleeves provided with flanges and toothed or groovedinteriorly, and held rotatably in the aforesaid arms, and avertically-adj ustable tool-holder which is grooved or toothedlongitudinally and adapted to fit and slide vertically in the flangedsleeves and to rotate therewith the same engaging the aforesaid gear,substantially as described.

' KENNETH OASSIOUS DAVIS.

Witnesses:

ALBERT J. BUTLER, CLEMET. R. RUSH.

